<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <!-- 前置自增  ++i-->
    <!-- 后置自增 i++ -->

    <script>
        // '2'转化为数字2 了，判断值是否相等
        console.log(2 == '2');

        console.log('a' < 'b');//true  由ASCII
        console.log('aa' < 'ab');
    </script>
</body>

</html>